java.sql.SQLException: Value '0000-00-00 00:00:00' can not be represented as java.sql.Timestamp
问题描述,在java应用程序中,数据表中有记录的time字段(属性为timestamp)其值为:“0000-00-00 00:00:00”
程序使用select 语句从中取数据时出现以下异常:
java.sql.SQLException:Value '0000-00-00' can not be represented as java.sql.Date
这是因为 “0000-00-00 00:00:00”在mysql中是作为一个特殊值存在的,但是在Java中, java.sql.Date 会被视为 不合法的值,被JVM认为格式不正确。
解决办法:
在jdbc的url加上 zeroDateTimeBehavior参数:
datasource.url=jdbc:mysql://localhost:3306/pe?useUnicode=true&characterEncoding=gbk&zeroDateTimeBehavior=convertToNull
对于值为0000-00-00 00:00:00(默认值)的纪录,根据不同的配置,会返回不同的结果:
不配置:默认返回异常
zeroDateTimeBehavior=round 0001-01-01 00:00:00.0
zeroDateTimeBehavior=convertToNull null
但这样有可能会报新的Exception:
The reference to entity "characterEncoding" must end with the ';' delimiter
其原因可能是在Properties文件或者xml文件中忘记进行特殊符号的转译了,
jdbc:mysql://192.168.1.155:3306/diandi?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull
需要改为:
jdbc:mysql://192.168.1.155:3306/diandi?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull
有以下几类字符要进行转义替换:
< |
< |
小于号 |
> |
> |
大于号 |
& |
& |
和 |
' |
' |
单引号 |
" |
" |
双引号 |
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